Vertical flue boiler



B. W. MAN DELBURG VERTICAL FLUE BOILER Nov. 20, 1951 3 Sheets-Sheet 1 Filed June 18, 1948 I IIIIIIIII'III'I',"

5 Sheets-Sheet 2 Filed June 18, 1948 INVENTOR.

Nov. 20, 1951 B. w. MANDELBURG VERTICAL FLUE BOILER Filed June 18, 1948 INVENTOR. 3217 1 0121 WM/VDZZBUE Patented Nov. 20, 1951 UNITED STATES PATENT OFFICE VERTICALFLUE BOILER Benedict W. Mandelburg, Searsdale, N..Y. ApplicationJune 18; 1948,'Serial No. 33%857 4-o1aims.,- ((11. 122-155) v This invention relates to heating boiler for steam vapor and hot water systems and more particularly to the detail construction of the same.

It is an object of the present-inventionto provide a heating boiler. with an improved-anddirecmd internal fluid circulation, comprising inner and outer shells wherein water bafiles will be provided between the shellsto direct theflow of wa ter or other fluids in their upward passage from side to side and into contact with the fluebafiies and wherein the water bafiies or projectionsmay be integral with the flue members and may be extended through slits in the outer shell and welded thereto whereby to eliminate the necessity for stay bolts.

Other objects of th'e present: invention are'to simplify the construction of: heating boilers, im'-' prove the water flow through the boiler and its? efficiency, to render the boiler inexpensive-to manufacture and to provide a. heating boiler Fig. 1' is a perspective view ofa-heatingboi'lerhaving .1 the bafiies of the: present invention and with the portion of the exterior casing, .the;in'- ner and outer shells being broken away :to::shoiw the interior of the boiler.

Fig. 2 is a fragmentary and perspective view of the inner shell with the water bafilesprotruding therefrom.

Fig. 3 is a sectional view'taken on line 3-3=o-f Fig. 1, the bafile being an extension of a fine bafile.

Fig. 4 is a fragmentary sectional view of the water bafile extending through a slit in. the outer. shell and welded thereto thereby toeliminatestay bolts.

Fig. 5 is a fragmentary sectional view' of a still further form of the present invention wherein angle members are welded to the inner" faces of an. outer shelland'according" to a modified form of the invention.

Fig. 6. is a perspective view' wherein multiple thereto.

ing boiler shownin-Fig. 7, the view beingtaken Fig. '1 is a fragmentary perspective view of oniline 88 thereof..

Fig. .9 i .aiplan' View of the vfiue .member before Y it has been bent across its diameter.

Fig. Tulsa-perspective viewof the bent flue member: illustrating how it. is; shaped .beforezitis; inserted through the slots-provided in the innershell.

Fig. .1 1 isaa perspective view .of the plate which isrusedto'formsthez innen-shell, the slits; and-lopen ingsiabeing providedtherein toreceive othermembers forming: a part; ofthe boiler, shown ,in Fig..- 7. a Referring: now .particularlyato,Eigs. 1, 2:,andx3i l5 represents an; inner shell whichzcomprisesia:

foot Iii adapted'to-irest on a, firebox ll, upright portions l8, flue projections 1.5, 20 and 2| ex tending inwardly-from the upright-portions and--* causingwater to. circulate acrossthem, a top pore tion 22 and clean out projections 23 extending- The smoke is led, out of the shell througha chimney flue 2.6.

At a low position intheinner shelland between the sides thereof, there is extended a. large flattened flue baflie or tube 21 open-atrits endsand; 1 connected within opening bn the-uprightpor- This tube 21 hasv a. bafileextension-28 at one. end. which is curved; downwardly to directwaterwhich'rises about theaf inner shell into the flue baffle or tube 21. This; bafile extension 28 is curved. and doesnot-engage.

The ends of the tube 21 are welded to the exter-ior of the inner shell l5 as The projection 28 ex tions of the shell, Fig. 3.

outer shell 29.

indicated at- 3| and 3:2. tends'across substantially the entire. width-- of the tube.

The outer shell 29 'extendsabout the inner shell. to provide. for the-waterspace between the shells..- The lower end of the outershell 2,9 extends-dowm l wardly along-the outer face ofthe fire box Hand; to the. bottom thereof The upper endof-rthe, shell extends a substantial distance-above the-top.

portion 22 of the inner shell to provide-a large water or steam chamber 34 therein. .An outletpipe35 extends from the outer shell for the:deliv e" ery of hotwater or stean' tothe heating ,radia tors or other fixtures.

About the sides, back and top, there is provided insulation material 36 and a casing 31 to retain it. The front side of the outer shell is not insulated. About the entire structure including the burner 25 is a casing 38. This casing is extended at the front or rear of the outer shell and air may enter openings 39 and be heated upon traveling upwardly through the front of the casing 38 for ventilating and providing air for burners. The clean out projections 23 extend to the front of the outer shell and through the same. These projections have cover plates 42 fastened to them. Burner control device 43 extends through the upper clean out opening.

In addition to the baiile extension 28 of the tube 27, the inner shell is provided with a projection 44 at the rear side to direct the water rising about the shell into space 45 within the flue projection 19. A similar balile projection I6 is provided at the side of the inner shell opposite the side where the'baflle extension 28 of the pipe 21 is located. This also serve to deflect inwardly the rising water. The water will leave the space 45 from the side not having the baiiie extensions. A similar projection 30, Fig. 3, is provided at opposite end of the flattened water tube 21 to direct water upwardly as it leaves the water tube.

On the flue projection 20, there is a similar arrangement of baiiles. A bafile 48 collects and directs the water rising from the outward end of the space 45 and directs the same into space 45. A baflle 51 extends cross the front side of the inner shell to direct the water rising on the front of the shell into the space 49. The inner and outer shells can be held separated from one another by stay bolts 52 disposed at different locations upon the shells.

In Fig. 4, there is shown a, form of construction wherein a projection 53 of a tube or flue bafile projection 54, is extended through a. slot 55 in the outer shell 29 and welded thereto as indicated whereby to serve a double purpose of a bafile for the water passing between the shells and as a stay bolt for bracing the shells. This provides a simplified construction. I

In Fig. 5, the baffles are provided on the outer shell and are in the form of angle irons 56 welded to the inner faces of the outer shell 29 at proper locations throughout the height of the boiler. These projections can thus be provided on the outer shell or on the inner shell and may be an integral part of the water tube or of the plate formations forming the flue projections.

Where tubes are used in the boiler a indicated at 51 in Fig. 6, they may be respectively provided with top extending baffle projections 58 which will pass through slots 59 in outer shell 29 and be welded thereto. These tubes will also pass through holes in the inner shell wall and will be Welded thereto. Water rising in the boiler wm be directed by these battles 58 into the tubes 51. The projections 58 will serve as stay bolts.

Referring now particularly to Figs. 7 to 11, there is shown a boiler formed of cylindrical inner and outer shells BI and 62. On the lower end of the inner shell, there is fixed a ring 63 of angular section which rests upon the top of fire box 64. The outer shell 62 extends downwardly along the exterior of the 'fire box and below the bottom of the inner shell.

"The inner shell 6! is formed from a flat plate which is cut in the manner as shown in Fig. ll. This plate has slits 65 extending inwardly from opposite edges and at differentelevations to re- 4 ceive flue projections 65, Fig. 10, when the plate has been rolled into the inner shell. Hole 6! are provided for the connection of clean out projections. A recess 68 is provided at the top edge of chimney flue 69.

The flue projections 66 are formed from a plate ll having a large half portion 12 providing for a water balile "l3 'whenthe plate H has been bent into the shape as shown in Fig. 10. These bent flue projections are extended into the slits of the inner shell plate. These projections 66 are welded to the edges of the slit at the top and bottom and provide space 14 through which Water may travel after having been diverted thereinto by the bafile '13. The water will leave the space '14 at the ends of the bafile as indicated at '15, Fig. 8. The water upon leaving these openings will next rise to meet the baflle 13 at the next elevated position. By these baffles, the water will be forced to traverse the spaces 14 and absorb the heat from the projections 66. The inner shell has a top portion l6 and a similar water space as with the previous boiler is provided above the top portion 16. The outer shell 52 has a top portion TI.

.The boiler, as shown in Fig. 7, can be similarly insulated as is the square type boiler shown in Fig. l and a heater casing can be provided therearound to enclose the burner entering the fire box 64.

It should be apparent that there has been afforded a simple method of forming a boiler from plate wherein flue projections and water bafiles will be provided. Inasmuch as the boiler shown in Fig. 7 is made of cylinders, stay bolts will not be required.

Itshould be further apparent that with both forms of the invention, the water is forced to take a given path inwardly through the space provided by the flue projections wherein it will be more quickly heated and its rise through the boiler will be at an increased speed. With boilers of this type, the water can be extended through them under pressure, a pump being connected to the return line of a two pipe water system and forced into the boiler at a low point. The baffles have particular use for boilers where the water is being forced through them.

While various changes may be made in the detail construction, it shall be understood that such changes shall be within the spirit and scope of the present invention as defined by the appended claims.

I claim:

1. A heating boiler comprising an inner shell, a horizontal flue projection extending inwardly into the combustion space, said flue projection providing a water space open on three sides and having an upper portion, an outer shell surrounding the inner shell and providing a water space therebetween and bafile means disposed on two adjacent sides of said water space of the flue projection at the level of said upper portion of the flue projection and in the space between the shells, whereby to direct water moving upwardly between the shells into the projection space from two open sides and outwardly of the projection space from the third open side thereof.

2. A heating boiler comprising an inner shell, horizontal flue projections extending alternately from opposite sides of the shell one above the other, each of said flue projections providing a water space open on three sides and having an upper portion, an outer shell surrounding the inner shell and providing a vertical water space therebetween and the spaces within the projections being in communication with said vertical water space, bafile means disposed on two adjacent open sides of one of said projections and at the level of the upper portion thereof, and bafile means on an alternate flue projection thereabove disposed on two adjacent open sides and at the level of the upper portion of said alternate projection, said alternate baffle means being oriented to lie on the opposite sides of the boiler from the baflle means of said one flue projection, whereby the water on passing in a serpentine manner through the water spaces will leave the projection water spaces at the opposite sides of the boiler.

3. A heating boiler comprising an inner shell, horizontal flue projections extending inwardly into the combustion space within the inner shell, said flue projections providing water spaces, an outer shell surrounding the inner shell and providing a space therebetween with which the projection water spaces communicate, said flue projections having upper portions with baflle extensions projecting into the space between the shells to direct water moving upwardly between the shells into the water spaces within the flue pro jections.

4. A heating boiler comprising an inner shell, horizontal flue projections extending inwardly into the combustion space within the inner shell, said flue projections providing water spaces, an outer shell surrounding the inner shell and providing a space therebetween with which the projection water spaces communicate, said flue projections having upper portions with baflle extensions projecting into the space between the shells to direct water moving upwardly between the shells into the water spaces within the flue projections and a water tube extending through two sides of the inner shell below the flue projections, said water tube having an integral bafile extension on one end thereof projecting into the space between the shells to direct water moving upwardly between the shells into the water tube.

BENEDICT W. MANDELBURG.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 181,609 Vick Aug. 29, 1876 365,934 Nichols July 5, 1887 399,975 Cunningham Mar. 19, 1889 820,932 Kriebel May 15, 1906 822,607 Hopler June 5, 1906 872,612 Harpporte Dec. 3, 1907 1,448,850 Long Mar. 20, 1923 1,462,018 Mason July 17, 1923 1,696,206 Lange Dec. 25, 1928 1,944,506 Grassman Jan. 23, 1934 1,981,895 Banta Nov. 27, 1934 2,119,606 Staufier June 7, 1938 2,229,686 Tholen Jan. 28, 1941 FOREIGN PATENTS Number Country Date 235,643 Great Britain June 19, 1925 

